character: Joseph Lister
topic: Aseptic Technique and Surgery
grade: 9
subject: Biology
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character: Pasteur, Louis
topic: Germ Theory of Disease
grade: 9
subject: Biology
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character: Nightingale, Florence
topic: Impact of Hygiene on Health
grade: 9
subject: Biology
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character: Semmelweis, Ignaz
topic: Hand Hygiene in Healthcare
grade: 9
subject: Biology
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